Hot Electrons Modulation of Third-Harmonic Generation in Graphene

Giancarlo Soavi; Gang Wang; Habib Rostami; Andrea Tomadin; Osman Balci; I. Paradisanos; Eva A.A. Pogna; Giulio Cerullo; Elefterios Lidorikis; Marco Polini; Andrea C. Ferrari

doi:10.1021/acsphotonics.9b00928

Hot Electrons Modulation of Third-Harmonic Generation in Graphene

Giancarlo Soavi, Gang Wang, Habib Rostami, Andrea Tomadin, Osman Balci, I. Paradisanos, Eva A.A. Pogna, Giulio Cerullo, Elefterios Lidorikis, Marco Polini, Andrea C. Ferrari

Department of Physics

Research output: Contribution to journal › Article › peer-review

32 Citations (SciVal)

Abstract

Hot electrons dominate the ultrafast (∼fs-ps) optical and electronic properties of metals and semiconductors, and they are exploited in a variety of applications including photovoltaics and photodetection. We perform power-dependent third-harmonic generation measurements on gated single-layer graphene and detect a significant deviation from the cubic power law expected for a third-harmonic generation process. We assign this to the presence of hot electrons. Our results indicate that the performance of nonlinear photonics devices based on graphene, such as optical modulators and frequency converters, can be affected by changes in the electronic temperature, which might occur due to an increase in absorbed optical power or Joule heating.

Original language	English
Pages (from-to)	2841-2849
Number of pages	9
Journal	ACS Photonics
Volume	6
Issue number	11
DOIs	https://doi.org/10.1021/acsphotonics.9b00928
Publication status	Published - 20 Nov 2019

Funding

We acknowledge funding from EU Graphene Flagship, ERC Grants Hetero2D, GSYNCOR, EPSRC Grants EP/K01711X/1, EP/K017144/1, EP/N010345/1, EP/L016087/1, and the Swedish Research Council (VR 2018-04252).

Funders	Funder number
Horizon 2020 Framework Programme	842251, 785219
Engineering and Physical Sciences Research Council	EP/L016087/1, EP/K017144/1, EP/N010345/1, EP/K01711X/1
European Commission
European Research Council
Vetenskapsrådet	VR 2018-04252

Keywords

graphene
hot electrons
nonlinear optics
optoelectronics
photonics
third-harmonic generation
ultrafast optics

ASJC Scopus subject areas

Biotechnology
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1021/acsphotonics.9b00928

Cite this

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abstract = "Hot electrons dominate the ultrafast (∼fs-ps) optical and electronic properties of metals and semiconductors, and they are exploited in a variety of applications including photovoltaics and photodetection. We perform power-dependent third-harmonic generation measurements on gated single-layer graphene and detect a significant deviation from the cubic power law expected for a third-harmonic generation process. We assign this to the presence of hot electrons. Our results indicate that the performance of nonlinear photonics devices based on graphene, such as optical modulators and frequency converters, can be affected by changes in the electronic temperature, which might occur due to an increase in absorbed optical power or Joule heating.",

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AU - Soavi, Giancarlo

AU - Wang, Gang

AU - Rostami, Habib

AU - Tomadin, Andrea

AU - Balci, Osman

AU - Paradisanos, I.

AU - Pogna, Eva A.A.

AU - Cerullo, Giulio

AU - Lidorikis, Elefterios

AU - Polini, Marco

AU - Ferrari, Andrea C.

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Hot Electrons Modulation of Third-Harmonic Generation in Graphene

Abstract

Funding

Keywords

ASJC Scopus subject areas

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